docs: def main(argv=None):
      """Run parquet utility application."""
      argv = argv or sys.argv[1:]
  
      parser = argparse.ArgumentParser('parquet',
                                       description='Read parquet files')
      parser.add_argument('--metadata', action='store_true',
                          help='show metadata on file')
      parser.add_argument('--row-group-metadata', action='store_true',
                          help="show per row group metadata")
      parser.add_argument('--no-data', action='store_true',
                          help="don't dump any data from the file")
      parser.add_argument('--limit', action='store', type=int, default=-1,
                          help='max records to output')
      parser.add_argument('--col', action='append', type=str,
                          help='only include this column (can be '
                               'specified multiple times)')
      parser.add_argument('--no-headers', action='store_true',
                          help='skip headers in output (only applies if '
                               'format=csv)')
      parser.add_argument('--format', action='store', type=str, default='csv',
                          help='format for the output data. can be csv or json.')
      parser.add_argument('--debug', action='store_true',
                          help='log debug info to stderr')
      parser.add_argument('file',
                          help='path to the file to parse')
  
      args = parser.parse_args(argv)
  
      setup_logging(args)
  
      import parquet
  
      if args.metadata:
          parquet.dump_metadata(args.file, args.row_group_metadata)
      if not args.no_data:
          parquet.dump(args.file, args)